(19)
(11) EP 0 677 965 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.07.1999 Bulletin 1999/30

(43) Date of publication A2:
18.10.1995 Bulletin 1995/42

(21) Application number: 95301549.2

(22) Date of filing: 09.03.1995
(51) International Patent Classification (IPC)6H04N 7/24
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 12.04.1994 KR 9407640
12.04.1994 KR 9407641

(71) Applicant: LG ELECTRONICS INC.
Seoul (KR)

(72) Inventors:
  • Kim, Dae Jin
    Seongnam-si, Kyungki-do (KR)
  • Kwak, Heung Sik
    Seongnam-si, Kyungki-do (KR)
  • Nam, Ho Jun
    Kwanak-ku, Seoul (KR)

(74) Representative: Cross, Rupert Edward Blount et al
BOULT, WADE & TENNANT 27 Furnival Street
London EC4A 1PQ
London EC4A 1PQ (GB)

   


(54) Partial response trellis decoder


(57) A partial response Trellis decoder which is concerned with a trellis coded modulation in a high definition television (HDTV) having a specific and detailed configuration includes a distance mapper for calculating first, second, third and fourth Euclidean distances from input signals from which NTSC interference is removed, a Viterbi decoder for Viterbi decoding the first, second, third and fourth Euclidean distances output from the distance mapper, a delay means for delaying and outputting the data output from the Viterbi decoder for each step, a ruler selector for selecting ruler type signal depending on the signals output from the delay means, and a slicer for slicing depending on ruler type signal selected in the ruler selector and the input signals from which NTSC interference is removed.







Search report